[update] 文件类型判断，用toLowerCase()之后在进行判断

src/views/standardRegulationLibrary/commonPage/StandardDetailPage.vue

@@ -413,7 +413,7 @@ export default {
         return
       }
       // pdf预览
-      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix)) {
+      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix.toLowerCase())) {
         const url = previewPdf(file.id)
         window.open(url)
         return

src/views/standardRegulationLibrary/domesticStandard/DomesticStandardList.vue

@@ -659,7 +659,7 @@ export default {
         for (let i = 0; i < idArray.length; i++) {
           const id = idArray[i]
           const name = nameArray[i]
-          var suffix = name.substring(name.lastIndexOf('.') + 1)
+          var suffix = name.substring(name.lastIndexOf('.') + 1).toLowerCase()
           if (suffix === 'pdf') {
             pdfFileList.push({ id, name, suffix })
           }

src/views/standardRegulationLibrary/overseasStandard/OverseasStandardList.vue

@@ -660,7 +660,7 @@ export default {
         for (let i = 0; i < idArray.length; i++) {
           const id = idArray[i]
           const name = nameArray[i]
-          var suffix = name.substring(name.lastIndexOf('.') + 1)
+          var suffix = name.substring(name.lastIndexOf('.') + 1).toLowerCase()
           if (suffix === 'pdf') {
             pdfFileList.push({ id, name, suffix })
           }